A wireless communication device, operating over frequencies allocated to Personal Communications Services (PCS), uses Global Positioning System (GPS) technology to determine the subscriber's exact location on a periodic basis. The device sends the location information to a database for...http://www.google.fr/patents/US5835907?utm_source=gb-gplus-shareBrevet US5835907 - Emergency PCS system for identification and notification of a subscriber's location
Emergency PCS system for identification and notification of a subscriber's ...
